It is interesting that the Russians originally designed the rifle NOT to have a clear point of release for the trigger. The logic being is it is supposed to be a surprise, and what better way to get a surprise than not having a clear break point (technically makes sense if you are following all the proper marksmanship procedures, practically not so much). However on the M91/30s one of the updates was to make it so there was a clear break point.

As mentioned the Mosin Nagant was very fast to produce, if I remember correctly about one produced from scratch in every 7 hours! It is likely a good thing they didn't have Enfields, I don't think they could have kept up.